/* body {
	
	background-color: rgb(240,240,240,0.1);

} */


* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

.contanier {
	width: 100%;
}

.contanier .box {
	float: left;
}

.box {
	width: 100%;
	height: 150px;
	border: 1px solid #444;

}


/* 清除浮动 */
.clearfix:before,
.clearfix::after {
	content: '';
	display: block;
	clear: both;

}


.contanier .box:nth-child(1) {
	background-color: rgb(80, 0, 0);

}

.contanier .box:nth-child(2) {
	background-color: rgb(120, 0, 0);

}

.contanier .box:nth-child(3) {
	background-color: rgb(160, 0, 0);

}
